Calculation of the Charlson comorbidity index*
| Score for each condition | Condition |
|---|---|
| 1 | Myocardial infarct |
| 1 | Congestive heart failure |
| 1 | Peripheral vascular disease |
| 1 | Cerebrovascular disease |
| 1 | Dementia |
| 1 | Chronic pulmonary disease |
| 1 | Connective tissue disease |
| 1 | Ulcer disease |
| 1 | Mild liver disease |
| 1 | Diabetes |
| 2 | Hemiplegia |
| 2 | Moderate or severe renal disease |
| 2 | Diabetes with end organ damage |
| 2 | Any tumour |
| 2 | Leukaemia |
| 2 | Lymphoma |
| 3 | Moderate or severe liver disease |
| 6 | Metastatic solid tumour |
| 6 | AIDS |
*Originally designed as a measure of the risk of 1-year mortality attributable to comorbidity in a longitudinal study of general hospitalised patients and validated for the same outcome in a cohort of breast cancer patients.